DETERMINATION OF DOUBLE-K FRACTURE TOUGHNESS OF CONCRETE VIA SCALING LAWS

摘要：

A trend extrapolation method for determination of double-K,I.e.Initiation fracture toughness and unstable fracture toughness,was put forward via scaling laws derived from energy release-based size effect model and boundary effect model,respectively.Three-point bending tests were carried out with 6 batches of various notched beams in geometric similarity.The maximum dimensions of these beams are 320 mm in height and 1280 mm in length.The true double-K independent of sizes was evaluated by trend extrapolation.The results show that the nominal double-K are according with the scaling laws derived in this article and this method can be used to evaluate the actual double-K of large-sized concrete structures in engineering.

关键词： double-K fracture toughness scaling law boundary effect model

作者: R.L.Hu P.Y.Huang G.W.Liu

作者单位: College of Traffic & Communications,South China Univ.of Tech.,Guangzhou,510641,China

会议类型: 国际会议

会议名称: 第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)

会议地点: 安徽黄山

会议语种:英文

页码: 334-337

在线出版日期: 2008-06-03（万方平台首次上网日期，不代表论文的发表时间）